Differential gear for power-driven vehicles.



No. 759,757. PATENTED MAY 10, 1904. R. D. SCOTT.

DIFFERENTIAL GEAR FOR POWER DRIVEN VEHICLES.

' APPLICATION FILED JULY 20, 1903.

N0 MODEL.

mm/ll;

UNITED STATES Patented May 10, 190 1.

PATENT OFFICE.

RUFUS D. SCOTT, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO ALBERT G. ROPES, OF MQRRISTOIN N, NEl/V JERSEY.

DIFFERENTIAL GEAR FOR POWER-DRIVEN VEHICLES.

SPECIFIOATIONforming part of Letters Patent No. 759,757, dated May 10, 1904. Application filed July 20, 1903. Serial No. 166,277. (No model.)

To aZZ whom it may concern.-

Be it known that I, RUFUS I). SCOTT, a citizen of the United States, residingin Beverly, in the county of Essex and State-of Massachu- 5 setts, have invented a new and useful Improvement in Differential Gears for Power-Driven Vehicles, of which the following is a specification.

This is an improved differential gear adapt- IQ ed to be applied to either the driving-shaft or the intermediate shaft of vehicles driven by explosive-engines or other power; and it has for its object to enable either wheel on the driving-shaft to operate as the driving-wheel 5 while the other is runningidly, as when traveling in a curved line, or both to become drivers, or neither, by reason of an exceedingly simple, strong, efficient, and easily operated mechanism.

2 The nature of the invention is fully described below and illustrated in the accompanying drawings, in which Figure 1 is a longitudinal section taken through the mechanism applied to the rear or 5 driving shaft. Fig. 2 is a similar view with the mechanism applied to the intermediate shaft.

Referring to Fig. 1, e and 6 represent the two portions of a divided rear or driving shaft 3 of an automobile, the adjacent ends being formed up into plates or disks 0 c, which are provided with coincident grooves (Z for the accommodation of antifriction-balls a. Each portion a b of the shaft is provided with a sleeve g, the inner ends 70 of the sleeves being formed into a box or case to inclose the parts 0, and said ends it are provided with and secured together by a sprocket-wheel k, which is connected with the power. Keyed at Z to 4 the two portions a and I) of the divided shaft are the disks 92, which, together with the disks or [iaugesp integral with the sleeves g, constitute the two members of friction-clutches. These clutches are of any well-known and suitable construction and are preferably operated by spreading mechanisms 0, which are moved into engagement by spreading levers r, actuated by cones s. The clutches, spreading mechanism, and cones are not new and require no detailed description, their purpose and operationlbeing to transmit rotative movement from the sleeves g to the portions a?) of the shafts and thence to the rear or driving wheels, which are located upon the outer ends of said portions.

In Fig. 1 the clutches are represented as out of engagement, and consequently, although the sprocket-wheel Z; and sleeves g are rotating, there is no rotation necessarily transmitted to either of the parts (/1 Z) of the drivingshaft. If the automobile is being driven in a straight line, the members of both clutches are moved by the operator into engagement by the cones s, and both portions to Z) of the divided driving-shaft are rotated equally. Should it be desired to drive the vehicle on a curved line or to apply the power to one driving-wheel, as in the ease of certain roughnesses or inequalities of the surface of the road, the members of the clutch on one side-that is, the outside in going around a curve or the side which is encountering the greatest obstruction--are moved into engagement, so that the driving-wheel on that portion of the divided shaft is driven by the shaft, while the other '7 5 wheel is idle and simply moving over the road by the friction of the road-bed.

In Fig. 2 exactly the same construction is illustrated and similarly lettered, as in Fig. 1; but the divided shaft isthe intermediate shaft instead of the rear or driving shaft, and the outer end of each portion of the divided shaft is connected by a sprocket-wheel t and a suitable chain with the rear or driving wheels.

In both cases the operation is exactly the 8 5 same, power being applied at will to either, both, or neither of the driving-wheels.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent. is

In a differential gear, the divided shaft consisting of the two portions a 7) formed at their ad jaceut ends into plates or disks 0; the sleeves g surrounding said portions (1/ 7) and formed at their adjacent ends into the two parts it of a box which ineloses said plates, and provided at their outer ends with clutch mem bers; clutch members adapted to rotate with the two pertions of the divided shaft; mechanism for mov- In testimony whereof I have signed my name ing' the clutch members on the sleeves into ento this specification in the presence of two sub- IO gagement With 1those on the shifts; and mechscribing Witnesses. I v anism for rigid y connectingt e box portions 7 X 5 it of the sleeves, whereby motion may be im- RUFUS O parted to each shaft independent of the other Witnesses: or to both simultaneously, for the purpose set BENJAMIN B. MURRAY, forth. EDWARD ELDRED. 

